Cook County, IL Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Side Yard
- 20+ ft minimum
- Special Use Front
- 50+ ft may apply
- Code
- Zoning Ord. 01-O-30
- Variance
- Zoning Board of Appeals
Summary
Cook County Zoning Ordinance (Ord. 01-O-30) establishes building setbacks varying by district. Side yard setbacks are at least 20 feet. Special uses may require front yard setbacks greater than 50 feet. Setbacks vary by residential district (R-1 through R-5).
COOK COUNTY ZONING ORDINANCE - SUMMARY OF RESIDENTIAL DISTRICT REQUIREMENTS. Yard Requirements: Front - R1: 50 Feet; R2: 50 Feet; R3: 50 Feet; R4: 100 Feet/Sewer, 150 Feet/Septic; R5: 30 Feet; R5A: 40 Feet (50 Feet Corner); R6: 30/20 Feet; R7: 60 Feet; R8: 60 Feet. Interior Side - R1: 30 Feet; R2: 20 Feet; R3: 15 Feet; R4: 40 Feet; R5: 10 Feet; R5A: 20 Feet (Single Family) / 25 Feet (Multi Family); R6: 10 Feet; R7: 20 Feet; R8: 20 Feet. Corner Side - R1: 50 Feet; R2: 35 Feet; R3: 25 Feet; R4: 15 Feet; R5: 15 Feet; R5A: 2 1/2 Feet or 10% lot width; R6: 15 Feet. Rear - R1: 100 Feet; R2: 75 Feet; R3: 50 Feet; R4: 25 Feet (Single-Family) / 50 Feet (Multi-Family); R5: 40 Feet; R5A: 10 Feet (Single Family) / 15 Feet (Multi Family); R6: 40 Feet.
Full Breakdown
The Cook County Zoning Ordinance (Ord. 01-O-30) establishes minimum building setbacks for all structures in unincorporated areas. Buildings and structures must be set back from side lot lines at least 20 feet in most districts. Front yard setbacks vary by district and street classification. Special uses may require front yard setbacks greater than 50 feet. Rear yard setbacks are also specified by district. Accessory structures have separate setback requirements, generally less than the principal structure. Corner lots have additional setback provisions for side streets. Variances from setback requirements may be sought through the Cook County Zoning Board of Appeals. The Department of Building and Zoning reviews all building permits for setback compliance.
Violations & Fines
Setback violation: stop-work order, $100–$1,000 fine. Structure may need to be relocated or removed. Variance may be required.
Frequently Asked Questions
What are the building setbacks in Cook County?
Can I get a setback variance?
Sources & Official References
Other rules in Cook County
Compare Cook County to another location·View the Illinois building setbacks & zoning overview
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